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I am considering a purchase of some factory tech service manuals for 03 sierra/silverado duramax. However, my truck is an 02. is there a significant difference between these two year models that might make this a wrong thing for me to do. Need some advice very soon. Thanks,
 

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Very very significant differences! Especially electrical. The 03 manuals would be pretty much useless to you as far as electrical goes. Mechanical stuff should be pretty much the same.Edited by: Max Power
 
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